Dissipation in a weak-link-limited superconductor as a problem of percolation theory
M. Prester, E. Babić, M. Stubičar, P. Nozar
DOI 10.1103/PhysRevB.49.6967 · Physical Review B
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Abstract
Broadening of the resistive transition of sintered GdBa2Cu3O7−x superconductor has been studied varying the measuring current over the range of five orders of magnitude. The observed well-defined branching points in the resistive transition coincide with the quasi-Ohmic saturation of V-I curves and scale with the average grain size. The results suggest the validity of a simple percolation model for dissipation in systems whose global superconductivity is realized by Josephson coupling of the superconducting grains. A common origin of structured resistive transition, observed in many superconducting systems, has been also discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| GdBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 96 | Pressure not reported | onset |
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